![]() ![]() A learning objective merges required content with one or more of the seven science practices. The AP ® Learning Objectives listed in the Curriculum Framework provide a transparent foundation for the AP ® Biology course, an inquiry-based laboratory experience, instructional activities, and AP ® exam questions. Information presented and the examples highlighted in this section support concepts outlined in Big Idea 1 of the AP ® Biology Curriculum Framework. It is also important to understand that evolution continues to occur for example, bacteria that evolve resistance to antibiotics or plants that become resistant to pesticides provide evidence for continuing change. Although Darwin’s theory was revolutionary for its time because it contrasted with long-held ideas (for example, Lamarck proposed the inheritance of acquired characteristics), evidence drawn from many scientific disciplines, including the fossil record, the existence of homologous and vestigial structures, mathematics, and DNA analysis supports evolution through natural selection. In divergent evolution, two species evolve in different directions from a common point, such as the forelimbs of humans, dogs, birds, and whales. Thus, evolution by natural selection explains both the unity and diversity of life.Ĭonvergent evolution occurs when similar traits with the same function evolve in multiple species exposed to similar selection pressure, such as the wings of bats and insects. ![]() Organisms may evolve in response to their changing environment by the accumulation of favorable traits in succeeding generations. When environments change, what was once an unfavorable trait may become a favorable one. Due to competition for resources and other environmental pressures, individuals possessing more favorable adaptive characteristics are more likely to survive and reproduce, passing those characteristics to the next generation with increased frequency. As we learned in our exploration of the structure and function of DNA, variations in individuals within a population occur through mutation, allowing more desirable traits to be passed to the next generation. The tenet that all life has evolved and diversified from a common ancestor is the foundation from which we approach all questions in biology. The theory of evolution as proposed by Darwin is the unifying theory of biology. But why don’t polar bears naturally inhabit deserts or rain forests, except, perhaps, in movies? Why do humans possess traits, such as opposable thumbs, that are unique to primates but not other mammals? How did observations of finches by Charles Darwin visiting the Galapagos Islands in the 1800s provide the foundation for our modern understanding of evolution? Furthermore, scientists estimate that several million more species will become extinct before they have been classified and studied. Millions of species, from bacteria to blueberries to baboons, currently call Earth their home, but these organisms evolved from different species. What are common misconceptions about the theory of evolution?.What are examples of homologous and vestigial structures, and what evidence do these structures provide to support patterns of evolution?.What are the differences between convergent and divergent evolution, and what are examples of each that support evolution by natural selection?.What is adaptation, and how does adaptation relate to natural selection?.How was the present-day theory of evolution developed?.In general, a geometric sequence is any sequence of the form \(a_n=cr^n\).In this section, you will explore the following questions: \) that we discussed earlier is a geometric sequence, where the ratio of any term to the previous term is \(2\).
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |